Power press for tile mosaics. and the like



APPLICATION FILED IULY29, I920.

' Patented July 18, 1922.

7SHEETSSHEET I.

glvwentoz D. CROSSLEY. POWER PRESS FOR TILE, MOSAICS, AND THE LIKE.

APPLICATION FILED ]ULY 29, 1920. I

Patented July 18, 1922.

7 SHEETSSHEET 2.

m m a w n. CROSSLEY.

POWER PRESS FOR TILE, MOSAICS AND THE LIKE.

APPLICATION FILED JULY291 1920.

Patented July 18, 1922.

7SHEETSSHEET 3.

mmu h a Witness D. CROSSLEY.

POWER PRESS FOR TILE, MOSAICS, AND THE LIKE.

APPLICATION FILED JULY 29, 1920.

D. CROSSLEY.

POWER PRESS FOR TILE, MOSAICS, AN D THE LIKE.

APPLICATION FlLD-JULY2 9, 1920.

1 41g 4()1 Patented July 18, 1922*.

1 SHEETSSHEET 5.

vwemloz /vitwdoo D. CROSSLEY.

POWER PRESS FOR TILE, MOSAICS, AND THE LIKE.

APPLICATION FILED JULY29, I920.

Patented July 18, 1922.

7SHEETS-SHEET 6- D. CROSSLEY PowER' PRE$S FOR TILE, mowcs, RND-THE L'IKE.

APPLICATION FILED JULYZ9. I920. I

Patented July 18, 1922'.

ISHEETS-SHEET 7.

airs res DAVID CROSSLEY, or rnnn ron, New JERSEY,

POWER rnnss rorv 'ritn IVIQSAIGS, AND ri-rze LIKE,

lAZSAGl.

- Application filed July 29,

To aZZ whom it may concern,"

Be it known that 1, DAVID CRossLuY; a citizen of the United States. residing at Trenton, in the county of Mercer and State of New Jersey have invented certain new and useful Improvements in Power Presses for Tile; Mosaics, and the like; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, 3

This invention relates to power presses for forming mosaics, floor and wall tiles and analogous products from plastic materials such as clay or any other substance. v

An object of this invention is to ini'oduce a power operated press wherein ease of opera tion and increased production are made pos sible through the construction of a novel tile forming means and associated operating mechanism.

Another object of the invention is the production of a power operated press including a movable die case adapted to receive the material or dust from a suitable tray positioned and moved with respect to the said also, means for compressing the material, and means for ejecting the compressed tile l'rom the case.

A further object of the invention is to produce a power press having means including a singlecam of novel construction for compressing the material and then imparting a final set thereto; and means for automatically stopping the press after the tile has been tormed and ejected from the forming the the parts of said press being stooped in a aosition to be ire-loaded without the manipulation of other me hanism.

Another" object isthe produce-ion of a" 'g'iower press including means for easily controlling the operation of the several mechanisms, whereby an operator is not required tojump upon a treadle otherwise exert himselfto effect the'compression oil? the material or the return of the mechanism.

l Vith these and other objects in view the invention further consists in the construction and arrangement of the several parts hereina'fter described and pointed out in the appended claims 7 Specification of Letters Patent. PatQ11t d'JEI EE 18 1920. Serial No. 399,841.

In the drawings which show an enibodi mentof my invention as adapted for use in forming tile and in which corresponding reference characters designate similarparts in the several views: f

F igurel is a front elevation of the press, the trea dle and clutch operated thereby being shown out of operative engagement;

Figure 2 is an end View looking at the right-hand end of the press;

' Figure 3 is a vertical transversesectional view on'the line 33 o1. Figure 1; s

Figure 411 is a similar'view on the line of Figure I;

Figure 5 is a horizontal sectional the line 55 of lgure 1;

Figure 6 is a detail horizontal sectional view of the movable plunger for effecting the compression of the material; taken on th'e'lin'e 6-6 of Figure l;

Figure 7 is a detail vertical sectional view of the movableplunger and associateddie case on the line 7 -7 of Figure 6; p

Figure 8 is a detail horizontal se 'ional view through the ad usting means for the view on" plunger, taken on the line S S of Figure l; i

F igure 9 is a ing die case; V

Figure 10 is'a detail sectional view on the line 10 10 of Figure ll, of the actuating or clutch device for controlling themovement of thecompressing plunger and the automatic stopping thereof;

Figure 11 is a vertical sectional view of the aforesaid plunger controlling device;

Figure 12 is a detail plan view of the cam end of the controlling lever and a portion of the clutch pin operated. thereby; Figures .13, 14 and 15 are a series of views in sectional elevation illustrating the variable movements of the die case and com- 1 presslng plunger as associated with the se-V T168 of relatively fixed plungers;

Figure 16 is a detail sectional View showing' the relative lost motion between the re spective mating clutch members "of the treadle operating device Generally stated the invention. comprises a tile forming device consisting of a series of relatively stationary plungers or posts against whlch the t1les are compressed, a

movable die case surrounding the said posts,

plan view or the tile forin- Figure 4.) bosses 1O and a compressing plungermovably associated with the the case; means for controlling the movements ofthe tile forming device whereby a preliminary and final compress- I .In Figure 15 the compressing plunger has been moved down upon the die case,.-itor further movement lIl unison with the die case [to efi'ect the compressing of the material therein as shown. In Figure 13 the com- -pressing plunger has been withdrawn or moved upwards, andthe die case further depressed, thereby permitting the stationary plungers to eject the compressed product.

The operating mechanisn'i oft the presshas been associated with thea foresaid movable die case and compressing plunger; to effectively control their movements in-a substantially automatic manner for. rapidly form ingthe tile, as will be-hereinatter set forth.

Referring to-the drawings the press comprises among other things al suitablelbase 1 having secured theretosupporting standards or uprightsQ, upon which latter is-mounted the bed or table 3. Extending upwardly from the bed 3 are spaced supporting standards 4, which constitute-the support for the cam shattyand associated mechanism to he presently described. A yoke 5 "is designed to oin the standards 4 as shown, thereby insuring maximum stability tothepress.

Bearings 6 are formed at the juncture of the yoke 5 and standards 4- and'are designed to receive the cam shaft Tiujpon which is secured the compressing cam 8. Suitable staybolts 9 are provided-to secure the yoke 5 and standards t to .the bed of the press and the lower supportirm uprigliits 2 as shown. (See These stiiy-b olts exten d :througli provided on the JiaIf-bea-ringsOf the yoke 5.

The cam 8 arranged intermediateof the .side members of the yoke 5, and positioned. centrally oithe press as shown. Setscr'ews 11 are provided for efl'e cting the relative a;d-

justment of the cam 8 upon the shaft 9 'as iihe aforesaid location r'Cl'l in turn the plunger 15 carried thereby.

to reduce the vibration and stabilize the press. The tendency of the single cam and associated parts to unevenly wear and wobble is also reduced to a minimum.

The periphery of the cam 8 is provided with recesses 12 into which are positioned blocks13"ofrelatively hard material such as steel, for example. Each block 13 is provi'ded with a raised surface 14, said surfaces preliminary set to the plastic material'whereby the accumulatlon ot' arr for instance is.

completely eliminated. The second operation is to imparttl 'e final set to the material for producing the completed tile.

The transmission of this double compressin-g action tothe tile forming device is obtained through a'novel :form of compressing plunger .15, and associated parts now to bedescribed.

Referrmg to Figure 7, the plunger 15 1s carried by a vertically movable carriage 16 slldingly mounted in a frame support 17 secured to the standards 4:. This frame sup port may be formed of front and heel: sections 18 and 119, respectively, to tacilitate the assembling of the p arts as will The understood. 1

A. roller 20 is provided on the carriage 16, and more particularly upon an adjustable support 21 including the screw-threaded eX-w tension 22. An adj usting nut 23 is provided.

ou the screw-threaded extension 22 and provides for vertical adjustment. The nut 23 is held stationary within the carriagezlG and is provided with gear teeth 24 designed to mesh with a worm 25 suitably journalled in the carriage 16. The worm is provided with a squared end 26, and is designed to receive a suite le opera-ting device 'for effecting the real adjustment of the carriage 16, and

The plunger 15 is preferably formed of suitable plates 27, the lower one of which const-itiu'es the compressing surface cooperatively associated withthe die case, and the up 'rer oueol which is movably spaced with relation to the lowermost edge oi. the carriiagelfi. These plates 27 move in unison a'ijrd -arc carried by a suitable stem 28 arranged to extend up *ardly through a-busl1- ing 29 suitably held within the carriage 16 by thepin i'lfi. "The plungeris provided with a; head 81, and a key 32 is preferablyprovidod for maintaining the alinement of the phmger as will be understood. 1

By this construction itwill be seen that the compressing plunger is loosely mounted against the die cas The means for maintaining the roller in contact with the compressing cam 8, com p ises weinhts 33 provided on arms 3 l-pivoted at 35 to the supporting standards 2. (See Figure 4;). Adjustable connections in the form of rods 35 are connected to the arms 34, and extend upwardly, being secured at their upper ends to levers 36' as clearly shown in Figure 7. The levers 36 are preferably Iiounted in roller or ball-bearing supports 35? secured to the supporting frame 17. Links ll' n 't l fth l 36 w) connect vie o posi e enrso e O\ eis to the vertically movable carriage 16. From -this construction it will be seen that the cured thereto.

' merit 50.

weights 3?- downward rock upon their pivots and in turn maintain the roller-20 in constant contact with the cam 8.

The title forming means, of which the aforesaid plunger 15 is a component partyinscrve to pull the connections cludes a die case and a pluralityof relativelystationary plungers or posts 40. As shown in my present embodiment of the 111- vention, the die case comprises a plate, per-* forated as best shown in Figure 9 to form relativel r small hexa onal tiles. The die case 15 provided with extensions 41 to which are secured rods 42 the latter serving to ver- I tic-ally guide the die case by extending oscillatory movement of the 'clutch member through the bed 3 and suitable sleeves 43 serods 4-2 yoke or cross: head 44 is adjustably secured, the said crosshead serving to impart vertical movement to thedle case in an effective manner as \villbe presently described,

The stationary plungers or posts extend upwardly from a base plate 45 secured o the bed 3. These plungers are provider with heads -16 of a shape corresponding to .the perforations in the die case! It will be terlal receiving compartments of the tile forming device. v

The means for ooperatively moving the die case with relation to the stationary posts comprises a rack t? provided on a rod 48, the. upper end of ve ically movable in a suitable sleeve 49 as snowm and has meshing therewith a seglhe"se -jmen.t50 is secured to the shaft 51, suitabl y thereby causing the levers to To the lower ends of the V which is secured to the cross-head 4-4 above referred to. The rod 4l8 ournalled inbearings 52 projecting I from i; case 1 0 do l; c 11 'e'. erme 1- L tl s ftl Ir'aln Int d A clutch member is slidin l I mounted.

on the shaft 51 and is designed to engage a mating clutch member 55 secured to the shaft 51. The clutch member 5a is operatively controlled by means of a 'treadle 56 suitably pivoted at 57 and connected means of a link 58 to the clutch member as shown. A weight 59 is provided on the treadle and serves to normally keep the clutch member 54 out of engagement.

The clutch member 55 is provided with an extension or arm 60, to which is adjustably secured one end of an eccentric rod 61. eccentric strap 62 is provided at the upper end of the rod 61 and ncircles a suitable eccentric 63 secured to the main shaft 6d.

lt'will be seen from the construction of the parts just described that motion is transfor continuously oscillating the said clutch member durlng the operation of the press. it will be seen that when an operator engages the clutch member 54 with the clutch member 55 by pressing down on the treadle 56, that movement will be transmitted to the segment 50 and in turn to the die case.

The construction of the mating lugs of the clutch members 5-l and 55 is such. as

to permit of suflicient lost motion between the lugs to prevent the transmission of an 55,; the result being that but positive move-- ment is nnparted to the segment-- and n turn to the die case. The efi'ect'of thismovement is to elevate the die case with respectto the.

upwardly extending bracket =69 secured to one ofthe standards 4-.

A pinion 70 is keyed to the main shaft 64, and has meshlng'therewith a relatively large gear 71. The gear 71 is loosely mounted upon the cam shaft 7, and is designed to be continuously revolve I A novel. clutch mechanism is interposed between the loosely mounted gear 71 and the compressing cam 8, whereby an operator positively controls the formation-of the tile Referring to Figures 1 and 2, this control 'ling device comprises a hand lever 72 pivotally supported at 78 to the bed The end of the lever 72 is connected to a vertical rod 7 L, preferablyoff-set asshown, the upper end of said rod being'connected at'75' with a mitted to the clutch member 55 in a manner &

lever/Z6. The lever 76 is pivoted at 77 and is provided with a nose '78 adapted to control the clutch mechanism referred to.

Referring to Figures ll and 12, this clutch comprises a collar 79 adjustably secured to the cam shaft 7 as shown. A spring-pressed pin 80 is slidingly mounted in the flange 81 ot the collar 79. and is ada )ted to extend therethroiwh and en a e 1 D b B one of a series of pins 82 secured to and extending trom the large gear 71. A spring 83 held in place by means of a screw 84 serves to yieldingly position the pin 80 within the collar as shown. The pin 80 is provided with a lip 85 having a beveled surface 86 cooperatively associated with a beveled surface 87 formed on the nose 78 of the lever 76 i hereinbefore described.

In operation it will be seen that as the nose.

of the lever is withdrawn from between the lip 85 of the pin and the flange 81 of the collar, that the spring 83 will force the said pin outwardly into the space between the gear .71 and the collar, thereby permitting it to engage one of the series of projections 82- carried by the gear 71. lVhen thus engaged motion is transmitted from the gear to the collar and is in turn imparted to the compressing cam 8 for forming the tile. The spring 89 encircling the rod 74 of the controlling device serves to immediately return the lever 76 and more particularly the nose '78 thereof into the path of the re volving lip 85 provided-on the pin 80, and as soon as the beveled faces of the lip and nose contact as shown inFigure 12, it will be seen that the pin 80 is withdrawn from engagement with the projection 82 and the revolving of the cam shaft stopped. Thus it will be seen that in forming each series of tiles, that but a single revolution ofthe cam shaft is utilized, and further that the stopping of the press after forming the said tiles is automatically provided for.

A suitable friction controlling device 90 may be provided for contacting with the periphery of the flange 81 as shown.

The tile ejecting means iscontrolled by an eccentric 91 operable upon the cam shaft 7, and having a rod connection 92 secured to an arm 93 extending from the shaft 51. i The timed relation of the parts is such that upon the completion of the tile compressing oper ations the die case is moved downwardly until the heads 46 of the posts are flush with the top of the said die case, see Figure 13, during which movement the tiles are ejected from the forming openings and are ready to be removed by an operator.

The main shaft 64 isfprovided with the usual pulleys 94 for imparting power to the press from any suitable source, (not shown). upplemental supporting rods 95 are interposed between the bed 3 of the press and the casting or housing forming the bearing sup* port o3 as best shown in Figure 1.

final During this operation it will be apparent may. also bemade as has mentioned. l 7 t Upon the complet on 'ot the compressing .members 54 and thereby causing the eccentric 63 to impart motion to the shaft and in turn tothe die case through the segment 50 and rack l7.

This operation causes the die case to move upwardly to form the material receiving compartments into which latter is deposited the dust from the tray. The material having beendeposited in the die case as shown in Figure 14, the operator withdraws the tray over the top of the die case to starting position, smoothingthe deposits of dust in the several tile forming compartments as will be understood.

The startlng lever '72 1s now grasped and pulled outwardly sufticiently to withdraw the nose 78 of the lever 76 to allow the pin 80 to move inwardly and. engage one of the projections 82 of the gear 71, thereby imparting rotary movement to the cam shaft 7 and 111 turn causing the compressing cam a; revolve in the direction of the arrow shown in Figure 8, and successively compress the mater al 111 the preliminary and manner as hereinbefore described.

that the weights 33 serve to keep the roller 20 against the periphery of the cam, and further that the loose mounting of the plunger 15 prevents.anytendency of the said .plunger to move away from the die case during the interval between the prehmxnary and final compressing operations produced by the high points on the cam.

The relatlve movement of the die case and compressing plunger in a downward direction 1s such that the material 15 finally compressed to a thickness shownin Figure 1.5.

i It will be understood, however, that ad justments can be made to permit ot'the formation of tile of varying thicknesses.

For instance, the die case 39 can be moved a greater or less distance-by loosening the nuts and adjusting the rod 61. connected to the arm 60, which adjustment will in crease or diminish the capacity of the material receiving compartments in the die case. The adjustment of the compressing plunger 15 within the sliding carriage 16, been hereinbefore operations, the plunger 15 is caused to re cede from the die case, whereupon the eccentric 91 through its connection with the shaft 51 will cause the segment to lower the raclr'd? and inso doing bringdown the cie case for the ejecting of the compressed tile.

The cam shaft has now substantially completed one revolution, and with the nose 78 of the lever 76 in its returned position through the action of the spring89, it will be seen that the lip 85 is engaged by said nose and the pin 80 withdrawn from engagement with the projection 82 on the gear 71, thereby causing the press to automatically stop.

The operator now movesthe tray across the die case pushing the compressedtile on to suitable receiving means. By this movement the tray is again in, position for depositingthe material into the die case, and the foregoing operationsare again repeated in the production of another series ofitiles. A leveling means consisting of adjustable screws 96 is provided foradjustingthe die casefas shown; i i V i From the foregoing it will be obvious that an operator is enabled to greatly increase the production of a machine constructed in accordance with this invention for the reason that little time, if any, is lost in removing the compressed tiles and positioning the tray for producing another set of tiles. It will also be apparent that the operator can easilyposition the die case by merely pressing the treadle, and then pulling the controlling lever, both of which devices are designed to automatically disengage the operating mechanism for bringing the press to a standstill upon the completion ofone revolution of the cam shaft and the compressing ofthe tiles.

While I have shown the press as primarily designed for use in producing tile, it Will be understood that various changes in the construction and arrangement of the several parts may be resorted "to for the production of other compressed articles, and I do not limit myselfto the exact structural details herein set forth.

I claim:

1. A power press of the class described including in combination a forming device composed of a series of stationary members, a die case surrounding said members, means for raising said die case, said means'including a clutch and counterbalanced treadle, means including a shaft and plunger for compressing the material to form the tile and means for lowering said die'case for ejecting the compressed material, said last mentioned means being operated from the said shaft independently of the said raising means.-

2. A power press of the class described including in combination a forming device comprising a series ofstationary members, a die case surrounding said members, a shaft, means interconnected with said shaft for raising said die case, means for compressing the material to form the tile, said means including a plunger and actuating shaft therefor, and means for lowering the said die case for ejecting the compressed material, said means being interconnected with and operated by the said actuating plunger shaft. 3. A power press of the class described including in combination a forming device composed of a plurality of stationary members, a die case surrounding said stationary members, means for raising said die case from normal position with the top face thereof flush with thesaid stationary members to form material receiving compartments, a compressing plunger cooperatively associated with said die case, means for moving said plunger, means for relatively moving the die case downwardly during the compressing operation, and means including the last mentioned means for lowering the die case flush with the said stationary members for ejecting the compressed material.

4. A power press of the class described including in combination a forming device composed of a plurality of stationary members, a die case surrounding said stationary members, means for raising said die case from normal flush position with the top of said stationary members to form material receiving compartments, a compressing plunger cooperatively associated with said die case, means includinga shaft for moving said plunger, and means for lowering said die case flush with the tops of said stationary members for ejecting the compressed mateterial, said last mentioned means being operatively controlled by the aforesaid shaft.

5. A. power press of the class described including in combination a forming device having a material receiving compartment formed of a stationary member and a surrounding die case into which the stationary member extends, means for raising said die case, a treadle for actuating said means, means for moving the die case for compressing the material within the'aforesaid compartment, and means for lowering said die case for ejecting the compressed material, said last mentioned means being operated independently of said treadle and immediately following the compression operation.

6. A power press of the class described including incombination a forming device having a material receiving compartment formed 'of a stationary member and a surrounding die case into which the stationary member extends, means for raising saidv die case from normal flush position with the top of said stationary member, and means for moving the die case for compressing the fit) material within said compartment, said means also serving to finally lowerthe said dieicase flush with the top of saidstationary member for ejecting the compressed material. y

7,-A power press of the class described including in combination a forming device having a material receiving compartment formed of a stationary member and a surrounding die case into whichthe stationary member extends, means for raising said die case from normal flush position with the top of said stationary member, a compressing plunger adapted to move against and away from said die case, means for moving said plunger against and away from said' die case, and means including a positively actuated eccentric and cam for moving said die case and plunger while engaged, for compressing the material, said eccentric means also serving to lower the die case flush with thetops of said stationary members for ejecting the compressed material when the plunger moves away fromthe diecase.

8 A power press of the class described including incoinbination tile forming means comprising a movable die caseand compress.

ing plunger, a shaft provided with a cam foiymoving said plunger toward and against thedie case, means for moving said plunger away from the die case, means for "rotating said shaft, and meansincluding aclutch for stoppingthe rotation of said shaftand c am after each revolution thereof.

9. A power press" of the class described including in combination tile forming means coi'upris'ing a movable diecase and compressing plunger, means for raising said die casemeans for lowering said die case,both of saidmeans beinginterconnected for continiumsoperation to form the product, and means including said movable die case for ejecting the compressed material, said last named means being interconnected with the means for raising the die case and the means for lowering the die. case aforesaid.

10. Ina power press of the class described the combination with a product forming die composed of relative stationary and movable members, a compressing plunger cooperatively associated with the movable member, means for imparting a plurality of compress ing operations ,to the product within the die, and means including a plurality of eccentrics for variably moving said compressing plunger and the aforesaid ,inovable member of the forming die in a continuous cycle of power operations with said compressing means, whereby the compressed -product is ejected and the said movable die memberstops flush with said stationary die member.

11. Ina power press of the classdescribed vice composed of relatively fixed and movable die members, means cooperatively asso ciated with the movable die member for pressing thematerial, operating means 1ncluding a clutch for positionlng themovable die member with respect to the stationarydie member to rec ive the material, and an eccentric for returning the movable die member to normal position.

12. Ina power press of the class described the combination with a product forming device composed of relatively fixed and movable die members, a movable plunger cooperatively associated with the movable die member for pressing thematerial, a cam for imparting a plurality of compressing movements to the plunger, a shaft for said cam, an eccentric adapted to position the movable die member to receive and compress the material, and another eccentric for further positioning the movable die member for ejectingthe compressed product.

13. In a power press of the class described each revolution thereof.

1 4. In a power press of the class described the combination with a product forming device composed of relatively fixed and movabledie members, a movable plunger cooperatively associated with the'movable die member for pressing the material, a cam for imparting compressing operations to the plunger, operating means for said cam, a clutch between said cam and operating means, and neans for automatically disengaging the clutch after each revolution of the cam.

15. In apower press of the'class described the combination'with a product forming device composed of relatively fixed and movable die "me-mbersya movable plunger cooperatively associated with the movable die membertfor pressing the material, means including a single cam having a plurality of high points for imparting successive compressing operations to the plunger, means for maintaining theplunger in constant contact {with the movable die member "during the revolving of the cam, and ,means for stODping said cam after each revolution thereof; H i

16. Ina powerpress of the class described the cqlbbination' with a product forming devicecomposed of relatively fixed and movable die members, means for adjusting said movable die membeiga movable plunger 00- operatively associated with the movable die member for pressing the material, and

means for adjusting said plunger with, respect to the adjustment of the aforesaid movable die member.

17. In a power press of the class described the combinationwith a product forming device composed of relatively fixed'and movable die members, and means for compressing the material, said means including a loosely mounted plunger cooperatively associated with the aforesaid movable die member, a movable carriage for supporting said plunger and a screw for vertically adjusting said carriage.

18. In a power press of the class described the combination with a product forming device composed of relatively fixed and movable die members, means for compressing the material, said means including a movable support, a plunger loosely mounted in said support and cooperatively associated with the aforesaid movable die member, a cam for moving said support and plunger, and means including a pivoted lever having one end connected to said plunger, a weight interconnected with the other end of said lever and adapted to maintainthe aforesaid movable support in contact with said cam.

19. In a power press of the class described the combination with a product forming device composed of relatively fixed and mov able die members, means including a loosely mounted plunger cooperatively associated with the movable die member for compressing the material, operating means for said plunger, and means including a plurality of levers and a weight for maintaining the said plunger in contact with the aforesaid movable die member during the compressing of the material.

20. In a power press of the class described the combination with a product forming de vice composed of relatively fixed and mov able die members, means including a support, a carriage movable in said support, an adjustable roller provided on said carriage, a loosely mounted plunger insaid carriage cooperatively associated with the movable die member for compressing the material, and operating means for imparting a plurality of con'ipres'sing movements to said roller, and means permitting said plunger to remain in contact with the mov-' able die member during the imparting of the plurality of aforesaid compressing movements.

In testimony whereof I atfix my signature, in presence o'li' two subscnbmg Witnesses.

DAVID OROSSLEY.

Witnesses DONALD M. ll/LiLLER, THOMAS W. l-loULRoYD. 

